Adjustable seat.



F. W. COY.

ADJUSTABLE SEAT.

APPLlCATION FILED AUG.3, I912.

Llwmwm Patented June 22, 1915.

THE NORRIS PETERS 60.. PHOTO-LITHO WASHINGTONv D. C

FREDERICK W. COY, OEIBOSTON, MASSACHUSETTS, ASSIG-NOR T0 CHARLES F. BROWN, TRUSTEE, OF READING, MASSACHUSETTS.

ADJUSTABLE SEAT.

Specification of Letters Patent.

Patented June 22, 1915..

To all whom it may concern Be it known that I, FREDERICK W. CoY, a citizen of the United States, and resident of Boston, in the county of Sufiolk and State of Massachusetts, have invented certain new and useful Improvements in Adjustable Seats, of which the following is a specification.

My invention relates to adjustable seats, stools, tables and the like, but particularly to duet benches for musicians.

The object of the invention is to provide an improved tilting mechanism for the tops or seats of such articles, it being often desired by musicians that the seat shall be capable of being adjusted forward and back as Well as in height, without inclining the seat laterally.

The improved bench herein shown comprises a seat designed to accommodate two persons, said seat being supported by two posts which in practice are ad ustably mounted in the base. The mechanism for adjusting the height of the bench is not illustrated herein as the same may be readily understood by referring to my Patent No. 1,052,042, dated February 4, 1913.

Of the accompanying drawings, Figure 1 is a front elevation of a duet bench embodying my invention; Fig. 2 is an end elevation of the same; Fig. 3 is a detail view, partly in section, of the tilting connections between the seat and its supporting posts; Fig. 4 is a detail plan of one of the post heads and its cams; Fig. 5 is a detail plan of the adjusting ring; Fig. 6 is an edge view of one of the plates which are attached to the under side of the seat, said figure also showing the hinge pin in position in the ears of said plate; Fig. 7 is an inverted plan view of one of the plates for attachment to the seat, said figure also indicating the cooperating adjusting ring by dotted lines; Fig. 8 is a detail elevation of the upper portion of one of the seat supporting posts and its head and cams; Fig. 9 is a perspective view of the hinge pin; Fig. 10 is a plan view of the two adjusting mechanisms carried by the two posts, in the relative positions which they occupy under the seat.

Similar reference characters indicate the same or similar parts in all the figures.

A suitable base is indicated in Figs. 1 and 2 as comprising a body 12 having legs 13. Said body 12 in practice will preferably contain height adjusting mechanism such as described and claimed in my said Patent No. 1,052,042, dated February 4, 1913.

The seat 14 is supported by posts 15, each of the latter having a head 16 provided with a bearing 17 for a hinge pin 18. As the mechanisms at the upper ends of the two posts are the same, a description of one will suffice for both. The pin 18 extends through cars 19 of a plate 20, which is attached to the under side of the seat 14, as by screws 21 passing through holes 22 formed in arms of the said plate, as best shown in Fig. 7.

The head 16 is formed with three inclines or cam surfaces 23, 24 and 25. The cams 23 and 24 are diametrically opposite each other and they are both inclined toward the same side of the post-head, this similarity of inclination being indicated by the dotted line 23 in Fig. 8 relatively to the surface 24 shown in that figure. The cams 23 and 24 cooperate with lugs 26 and 27 respectively of an adjusting ring 28 (see Figs. 3 and 5), the said adjusting ring being interposed between the head 16 and its cams, and the under surface of the plate 20. Said plate 20 is preferably provided with flat-faced lugs 29 to sustain the pressure of said plate 20 upon the adjusting ring and to enable the latter to be shifted as hereinafter described. To guide the ring 28 or hold it in position when being swung, the plate 20 is provided with a plurality of lugs 30 and a lug 31 (Fig. 7), the outer sides of said lugs fitting within the inner circle of the ring 28. The lug 31 also serves as a stop to limit the amount of movement that may be imparted to the adjusting ring in one direction or the other, said ring being provided with two inwardly projecting lugs 32, one or the other of which is adapted to contact with a side face of said stop lug 31.

Each ring 28 is formed with an arm or car 33 (Figs. 3, 5 and 10), said arm having a pin 34. The two pins 34 are connected by a link 35, and there is also connected to each pin 34 a rod 36 extending out through the end of the seat (Figs. 1 and 10) and having a knob 37 so that a person either standing by the bench or sitting upon it can push either knob 37 so as to simultaneously swing or partially rotate both of the adjusting rings 28 to any desired amount Within the limits prescribed by the stops 31, 32.

It will now be understood that when the rings 28 are adjusted as described the lugs 26, 27 thereof, riding along the inclined faces or cams 23, 24, will react through the plates 20 to tilt. the seat 1% and hold it in or at the desired inclination.

Sometimes it is desired that the seat shall be free to rock forward and back. To enable this result to be obtained the spacing of the lugs 31, 82 is such as to permit the ring 28 to be swung far enough so that the lug 27 will pass beyond the higher end of the cam 2% to a position above the incline 25, the other lug 26 being, of course, at this time beyond the lower end of cam 23. The lugs 26, 27 are then free from being simultaneously supported and the seat may be rocked loosely. Of course to attain this result the portion of the head 16 which carries the cam 25 might be entirely omitted, but in that case there would be an abrupt wall left at the higher end of the cam 23 that would interfere with the return of the ring lug 27 back to cooperative position above cam 23; therefore the incline or cam 25 is provided so as to guide the lug 27 back on to the cam 2-l when it is desired to restore the parts to position for firmly holding the seat to prevent it from rocking or tilting, this being when the adjusting rings are positively swung to vary the positions of their lugs 26, 27 on the cams 23, 24. When the lugs 26, 27 are on the earns 23, 2%, the seatis positively held at any angle within its range of tilting movement, without possibility of tilting farther, or rocking, in any direction. When the seat is to be in a horizontal position the rings are swung or partially rotated so that their lugs are at the bottoms of the inclined planes formed by the earns 23, 24k, and when the.

rings are adjusted to carry their lugs up the inclines or cams the seat will be correspondingly tilted. The utility of so adjusting the mechanism as to leave the seat free to rock or tilt loosely is especially applicable when the invention is applied to what is commonly known as a tilting chair, such as employed for oiiice use. In such case there will, of course, be a single post 15, the construction remaining the same then as shown in Figs. 3 and 7 of the drawings.

The hinged connection such as shown at 17 18, prevents any turning movement of the seat or post relatively to each other on a vertical axis, and, of course, will prevent seat and the seat-supporting post, a seattilting member interposed and horizontally movable between said cam and the seat, and having means to cooperate with said cam to vary the inclination of the seat, and means for moving said tilting member to adjust the angle of the seat.

2. A duet bench comprising a base portion, seat-supporting posts connected with said base portion, a seat supported by the seat-supporting posts, a hinged connection between the seat and each of its supporting posts, cams carried by said posts, rings interposed between said cams and the seat, and having lugs to cooperate with said cams to vary the inclination of the seat, and means to connect said rings and rotate them to adjust the angular or tilting relation between the seat and the supporting posts.

3. An article of the character described comprising a base, a seat-supporting post sustained by the base and having cams, a seat pivotally mounted on the post, a plate secured to the seat, a ring adjacent said plate and having lugs to cooperate with said cams to vary the inclination of the seat, and means for fixedly adjusting the position of said ring.

at. A duet bench comprising a base, two posts mounted in said base, a seat pivotally connected with the upper ends of said posts, horizontally rotatable cams carried by the upper ends of the posts, rings having lugs to cooperate with said cams to vary the inclination of the seat, and means for simultaneously rotating both of said rings.

A duet bench comprising a base, two posts mounted in said base, a seat pivotally connected with the upper ends of said posts, horizontally rotatable cams carried by the upper ends of the posts, rings having lugs to cooperate with said cams to vary the inclination of the seat, and means for simultaneously rotating both of said rings, said means comprising a bar connecting the two rings, and push rods extending to both ends of the seat.

6. A duet bench comprising a base, two posts mounted in said base, a seat pivotally connected with the upper ends of the posts, cams carried by said posts, and adjusting rings having lugs to cooperate with said cams for varying the inclination of the seat, means being provided whereby the lugs of the adjusting rings may be shifted beyond the ends of the cams to permit the seat to rock loosely.

In testimony whereof I have aliixed my signature, in presence of two witnesses.

FREDERICK W. COY. Vitnesses C. F. BROWN, P. V. Pnzznr'rr.

Copies otthls patent may'be obtained for five cents each, by addressing the "Commissioner of Patents.

Washington, D. 0. 

